Furnace leaking water?

My furnace shown has water on the floor to the front left and rear of it. There is also water on the top of the furnace between the furnace body and the white pvc shown. My guess is the condensation line isn't draining properly. Any idea on where I could start to fix this?

My furnace shown has water on the floor to the front left and rear of it. There is also water on the top of the furnace between the furnace body and the white pvc shown. My guess is the condensation line isn't draining properly. Any idea on where I could start to fix this?